Charles Ellicott Commentary Jeremiah 39:13

"So Nebuzaradan the captain of the guard sent, and Nebushazban, Rab-saris, and Nergal-sharezer, Rab-mag, and all the chief officers of the king of Babylon;" — Jeremiah 39:13 (ASV)

Nebushasban. —The name, which occurs in the Annals (compare Assur-banipal in Records of the Past, i. 64), is possibly another form of the Nebo-sarsechim of Jeremiah 39:3. Rab-saris (= chief eunuch, or chamberlain) is, as before, his title. Ashpenaz appears as holding the same position, possibly, as Nebushasban’s predecessor, in Daniel 1:3.